Die foe beading metal pulleys



v G. METAL PULLBYS.

Patented Apr'. Q, 1895.

mim-Ammun- NWN I UNITED STATES PATENT EEIcI-t,

OLIVER WILLIAM KETOHUM, OF TORONTO, CANADA.

DIE FOR BEADING METALPULLEYS.

SPECIFICATION forming part of LettersPatent N. 537,291, dated-April 9,1895. nppnaioniemuneie,1894. serrano. 514,722. (No @dem T0 all wiz/0m,it may concern:

Be it known that I, OLIVER WILLIAM KETCHUM, manufacturer, of the city ofToronto, in the county of York,in the Province of Ontario, Canada, haveinvented certain new and useful Improvements -in Dies for Beading MetalPulleys, of which the following is a specification.

My invention relates to improvements in presses for forming a bead onthe edge of the rim of -sheet metal pulleys in which the web ispreferably formed integrally'with the rim and the object of theinvention is to design such a form of dies and apparatus as will 'uponone downward stroke of the ram effectually form up an inwardly turnedbead on the free edge of therim of the pulley and it consistsessentially of securing to the upper ram of the press a diecorresponding in form to the web and forming on the stationary portionof the lower die an annular groove in which the bead is formed, thepulley being supported ,upon the lower ram by a supplementary ring ofpeculiar construction and the upper ram being designed to be broughtdown against the pressure of the lower ram so as to force the edge ofthe'rinn into and around the annular groove formed in the stationaryportion of the die as hereinafter more particularly explained. A

Figure l. is a sectional perspective view showing the upper ram raisedand the pulley placed in position ready to be beaded. Fig. 2 is asimilar view showing both rams down and the pulley with the bead formedon it.

In the drawings like letters of reference indicate corresponding partsin each figure.

A, is the upper die block of the upper ram i which has axed to it byAmeans' of suitable bolts, B, a supplemental die block, C.

D, is the cylindrical portion of thelower die. E, is a ring which issecured withinthe same at the bottom and provided with an upwardlyextending shoulder or ange, e, which has an annular groove, e', made inthe same next to and abutting the cylindricalportion, D.

F, is the lower ram, the die, F', of which is formed to correspond withthe web of the pulley when it is being formed up into shape from a sheetof metal by the upper die block, A. y

G, is the web-holder which is comprised preferablyof an upper and alower plate, G', y

G2, respectively and a central ring, Gi, which may be of any determinedldepth, this vof course depending on the width it is desired to make therim of the pulley. The ring, G3, is shown preferably connected to rtheupper and lower plates in step fashion although any other simple meansof connections such as a tongue and groove may be employed. The plate,G2, is made to fit the die, F', .and the plate, G', is made of such ashape so that the web of the pulley, H, when reversed will fit snuglyupon such plate.

The operation in forming the bead on the free edge of the rim, H', ofthe pulley, H, is as followsz--Before the pulley is put into the pressthe free edge of the rim is turned slightly inwardly as indicated inFig. 1. It is then placed in position on top of the web holder, G, whichit willbe noticed is brought up by the lower ram, F, in the positionshown in Fig. l. The pulley is of course, placed upon the web-holder inthe reversed position with the web uppermost so as to fit upon thewebholder as shown. The rim, H', extends down within the cylindricalportion, D. Hydraulic pressure is exerted upon the upper ram and lowerram. The pressure upon the upper'ram being the greater, it will forcedown the lower ram upon its seat on the ring, E. In bringing it down theinwardly turned edge, h, of the rim, H', is guided by the grooves, e',around ter Vthan the pulley when the upper die is withdrawn and thelower ram forces the pulley back again into the position shown in Fig.l,v such pulley may be readily withdrawn.

In order to provide for the perfect forming of the bead without thepulley being distorted or thrown out of shape it is absolutely necessarythat such a device as the webholder must be provided and I find itextremely simple and effective to provide a supplemental ring for suchweb-holder whereby pulleys of different Widths of rims may be beaded bysimply providing other rings like, G3, of determinate width, this ofcoursede- It willbe nol pending upon the width of the rim of the pulleyand the amount necessary to turn in wardly for the bead.

It will be understood that the groove, o, which I show on the face ofthe upper die at the circumferential edge might be used for turning thebead on the free edge of the rim of the pulley if the pulley werereversed to the position shown in Fig. l. It will also be understoodthat the web holder, G, might be made of a single plate made to tit theface of the lower die and yet accomplish the object for which it. isdesigned.

Vhat I claim as my invention isl. A die for beading sheet metal pulleyscomprising the lower die portion having the annular groove, the rimretaining ring adjacent to said groove, the web support and the plungerfor forcing the pulley downward to cause its open edge to enter saidannular groove, substantially as described.

2. In combination the lower die havingthe annular groove, the rimretaining ring, the plunger, and the web support of less diameter thanthe rim, substantially as described.

3. The combination with the upper die block and lower die block movablewithin the cylindrical portion of the lower die and means for supportingthe pulley rigidly upon the lower die block so that the rim extendswithin 3o the cylindrical portion, of the ring secured within thecylindrical portion and forming a scat for the lower die block andhaving an annular groove formed in the top of the upper shoulder of thering abutting the cylin- 35 drical portion of the die as and for thepurpose specified.

4. The combination with the upper die block, C, and lower die block, F',and web holder, G, the upper plate, G', of which con 4o forms to thereversed position of the Web and lower plate of which conforms to theshape of the die block of the cylindrical portion, D, ring, E, havingthe annular groove, e', formed at the top abutting the cylindricalportion as 45 and for the purpose specified.

5. The combination with the upper die block, C, and lower die block, F',and webholder, G, comprised of the upper plate, G',

lower plate, G2, and central ring, G3, of the 5o

